Designing metal-matrix composites into actual components requires both experimental and analytical characterization of the behavior of these composites. This report describes mathematical modeling and experimental characterization of the elastoplastic behaviors of composite materials made of copper and copper-alloy matrices reinforced with carbon fibers in a biaxial weave known in the industry as "8-harness satin." The experiments included monotonic- and cyclic-tension and -compression tests, combined tension/compression tests, and monotonic- and cyclic-shear tests, with strain gauges attached to specimens oriented, variously, with the fill or warp directions of the weaves along the directions of applied stresses.

This work was done by Brett A. Bednarcyk, Christopher C. Pauly, and Marek-Jerzy Pindera of the University of Virginia for Lewis Research Center.To obtain a copy of the report, "Experimental Characterization and Micromechanical Modeling of Woven Carbon/Copper Composites," access the Technical Support Package (TSP) free on-line at under the Materials category,or circle no. 132 on the TSP Order Card in this issue to receive a copy by mail ($5 charge).

Inquiries concerning rights for the commercial use of this invention should be addressed to

NASA Lewis Research Center
Commercial Technology Office
Attn: Tech Brief Patent Status
Mail Stop 7 - 3
21000 Brookpark Road
Ohio 44135.

Refer to LEW-16540.